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Fuel
Systems
Manufacturer Requirements
FEDERAL LAW
183.572 - Grounding
Each metallic component of the fuel fill
system and fuel tank which is in contact with fuel must
be statically grounded so that the resistance between
the ground and each metallic component of the fuel fill
system and fuel tank is less than 100 ohms.
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Fuel flowing from the dispensing nozzle into
a fuel tank is a potential source of a static electric charge
which could cause a spark between the dispensing nozzle and
metal component of the fuel tank fill system. To prevent such
a spark from occurring, metallic components of the fuel tank
fill system and metallic fuel tanks must be grounded.
Grounding or bonding may be accomplished by
connecting the metallic components electrically by running
a wire from one component to the next, and so forth to the
boat’s ground. Grounding can usually be accomplished
by a connection to the common bonding conductor or the engine
negative terminal.
If the fuel tank deck fill fitting is nonmetallic,
and nonconductive hose is used as a fill pipe, there is no
need for grounding the fill fitting. Chrome-plated plastic
fill fittings are treated the same as metallic fittings.
NOTES:
- If a metal hose attachment fitting
is used, it must be grounded.
- Fill cap retaining chains need not
be grounded.
FIGURE 36 - Fuel Fill System Grounding
CAUTION
BONDING WIRES PUT UNDER
THE END OF A HOSE COULD CAUSE A FUEL LEAK. The bonding
wire should be a “bolted connection” on
the tank’s ground tab. At the deck plate the bonding
wire may be securely connected to a ground fitting provided
on the deck plate, or securely connected to a deck fill
plate bolt. |
TO COMPLY WITH THE LAW
- Are metallic components of the fuel
tank fill system and the metallic fuel tank grounded?
- Is the resistance between each of
these metallic components, including the metallic
fuel tank and ground less than 100 ohms?
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